寻找字符串操作的最佳方法

[System/EventID=100 or System/EventID=108] ,可交换字符串应以开头 [ 最后以 ] 加上必须删除额外的 or

try
{
    string systemEvents = string.Empty;
    var eventIds = "100,108".Split(',');

    systemEvents += "[";

    foreach (var eventId in eventIds)
    {
        systemEvents += "System/EventID=" + eventId + " or ";
    }

    var X = systemEvents.Remove(systemEvents.Length - 4).Trim();

    var Y = X + "]";
}
catch (Exception ex)
{
    throw ex;
}